The active ingredient in the GS-441524 Tablets is GS-441524, and it has a shelf life of two years. Therefore, it is safe to use and expires at the appropriate time. Overall, GS-441524 Tablets is an effective medication for the treatment of Feline Infectious Peritonitis Virus (FIPV). It provides a safe and reliable way to treat FIPV, which is convenient as it is easy to store at room temperature and comes in a pill form. The active ingredient, GS-441524, has an expiry date of two years, which makes it safe to use and reliable for long-term use.